WOT on diesel tractors

[TomSeller]

Tom,
My dad used to say the best way to keep cows in the fence is to have something for them to eat.

Your Dad was a wise man. Sometimes I think the girls just want change pastures just to change pastures. I give in keep the bellowing down, I think the girls have my number. Come fall feeding time they have eaten every green blade, so it works out.

 

[buickanddeere]

Why did the engineers who designed the machine make a WOT position? There must be occasion to use such an adjustment?
The JD 10A backhoe on my 1640 runs about the correct speed at 1200-1300 rpm. At 1400rpm she's just too fast at full valve opening. That's with a direct hydraulic connection instead of through the scv. That is with the small eight piston pump rated 13gpm at 2500rpm.
I hope these economists are not running pto generators at less than rated rpms.

 

[DK35vince]

Why did the engineers who designed the machine make a WOT position? There must be occasion to use such an adjustment?

Sure there are times you want/need WOT.
If you need it, use it.
But some here are claiming you need to run at or near WOT at all times. And that is complete BS

 

[FatSlob]

Sure there are times you want/need WOT.
If you need it, use it.
But some here are claiming you need to run at or near WOT at all times. And that is complete BS

its not complete bs. You NEED to run at WOT to run the machine at full potential as specified on the specs of the machine for full HYDRAULIC flow on implements that call for that. Such as the rated drive speed and such implements as front end loader and anyother implemts that run off the hydraulic pumps. So to say what you said is complete BS. I can see that many are blind to what the manufacturer designed the machine for to run at full potential. If you want to run the machine at partial potential because ou want to be married to it for life and want to get 20 years out of it, that is your ordeal but that is not what the engineers had in mind. I can assure you of that. they designed the machines for full productivity and to minimize hours of usage. PTO speed and torque is one thing but hydraulic flow is another

 

[boblibido]

its not complete bs. You NEED to run at WOT to run the machine at full potential as specified on the specs of the machine for full HYDRAULIC flow on implements that call for that. Such as the rated drive speed and such implements as front end loader and anyother implemts that run off the hydraulic pumps. So to say what you said is complete BS. I can see that many are blind to what the manufacturer designed the machine for to run at full potential. If you want to run the machine at partial potential because ou want to be married to it for life and want to get 20 years out of it, that is your ordeal but that is not what the engineers had in mind. I can assure you of that. they designed the machines for full productivity and to minimize hours of usage. PTO speed and torque is one thing but hydraulic flow is another

What state would allow me to marry my machine? Would it be a civil union? Who would perform the ceremony?

 

[yelbike]

its not complete bs. You NEED to run at WOT to run the machine at full potential as specified on the specs of the machine for full HYDRAULIC flow on implements that call for that. Such as the rated drive speed and such implements as front end loader and anyother implemts that run off the hydraulic pumps. So to say what you said is complete BS. I can see that many are blind to what the manufacturer designed the machine for to run at full potential. If you want to run the machine at partial potential because ou want to be married to it for life and want to get 20 years out of it, that is your ordeal but that is not what the engineers had in mind. I can assure you of that. they designed the machines for full productivity and to minimize hours of usage. PTO speed and torque is one thing but hydraulic flow is another

That's like saying if you want top speed out of your race car you need to run it a wot. Well no ****.
In your previous post you mentioned getting full hydraulic flow for your excavator, an excavator is a single purpose machine, fine work at wot if you need it. A tractor on the other hand does not need to be at wot all the time, you may need a larger tractor. Tractors are multipurpose tools, sometimes at wot sometimes not. Tilling for example would be at wot on my particular tractor anyway. Box blading my driveway would be at 50%. I doubt very much I'll overheat the transmission that way either.

 

[jenkinsph]

Fat Slob,
A consideration to think about is comparing an industrial loader and/or excavator in a given hp rating to a compact or ag tractor. Just pick a hp range and compare the loaders and hoes, the industrial loader and the excavator will always be larger and higher capacity. Much more likely to use all the hp available to them. For instance a 60 hp Cat wheel loader will lift and weigh about twice as much as a normal 60 hp compact tractor. A 60 hp excavator will be twice the weight and have twice the capacity of a 60 hp tractor with backhoe in most cases. I think that is a large part of it.

 

[GManBart]

its not complete bs. You NEED to run at WOT to run the machine at full potential as specified on the specs of the machine for full HYDRAULIC flow on implements that call for that. Such as the rated drive speed and such implements as front end loader and anyother implemts that run off the hydraulic pumps. So to say what you said is complete BS. I can see that many are blind to what the manufacturer designed the machine for to run at full potential. If you want to run the machine at partial potential because ou want to be married to it for life and want to get 20 years out of it, that is your ordeal but that is not what the engineers had in mind. I can assure you of that. they designed the machines for full productivity and to minimize hours of usage. PTO speed and torque is one thing but hydraulic flow is another

Tractors don't need to run at WOT to have full hydraulic flow.

 

[RDrancher]

. Can't see your rational about WOT . Has your tractor ever been loaded enough that rpms drop?

Sure it has. Tires are loaded front and rear and I run a 1200 lb Gannon. It will still spin the tires in certain situations. How would running over my normal 2300 RPM help? Maybe you know...I'm willing to learn.

 

[SPYDERLK]

Tractors don't need to run at WOT to have full hydraulic flow.

Youre right. -- They need to run at Hi Idle - Full RPM, for full hydraulic flow. WOT, a fully fueled condition, only happens when the engine is loaded to capacity at a setting near or at Hi Idle.